Cook Inlet at a glance
- 40 maverage depth
- 33 mmedian depth
- 165 mmaximum depth
- 17,118 km²water area
Cook Inlet is a bay. Inside its outline the GEBCO grid has about 17,118 km² of water, with an average depth of about 40 m (the middle value is 33 m) and a maximum of 165 m, found at 59.56° N, 151.49° W.
Open the map at the deepest cell and tap to read the depth.
How deep is each part of the Cook Inlet?
The bar splits the Cook Inlet's water by depth. Each colour is a depth band, and the shares add up to 100%.
- 0 to 200 m: 100%
- 200 to 1,000 m: 0%
- 1,000 to 4,000 m: 0%
- 4,000 to 6,000 m: 0%
- below 6,000 m: 0%
Named features near the deepest point: Kodiak Seamount (325 km), Giacomini Seamount (456 km), Patton Seamount (557 km), Cowie Seamount (618 km).
The Cook Inlet if sea level dropped
The slider on the map lowers the sea in steps. This table shows how much of the Cook Inlet's water would be land at each step.
| Sea level lowered by | Becomes land | Share of its water |
|---|---|---|
| 10 m | 2,599 km² | 15.2% |
| 20 m | 5,321 km² | 31.1% |
| 50 m | 12,059 km² | 70.4% |
| 80 m | 15,362 km² | 89.7% |
| 120 m | 16,517 km² | 96.5% |
| 200 m | 17,118 km² | 100% |
| 500 m | 17,118 km² | 100% |
| 1,000 m | 17,118 km² | 100% |
| 2,000 m | 17,118 km² | 100% |
| 3,000 m | 17,118 km² | 100% |
| 4,000 m | 17,118 km² | 100% |
| 6,000 m | 17,118 km² | 100% |
A simple bathtub model: it lowers the sea everywhere by the same amount and does not simulate how water would really drain.
Nearby seas
- Gulf of Alaska average depth about 1,559 m
- Bering Sea average depth about 1,844 m
- Chukchi Sea average depth about 42 m
- Beaufort Sea average depth about 1,407 m
- Salish Sea average depth about 130 m
- East Siberian Sea average depth about 26 m
Nearest by the centre of each outline. All oceans and seas
Frequently asked questions
How deep is the Cook Inlet?
On average about 40 m in the GEBCO grid (the middle value is 33 m). The deepest cell inside its outline is 165 m, at 59.56° N, 151.49° W.
How big is the Cook Inlet?
About 17,118 km² of water inside its Natural Earth outline, counted from the grid cells that are below sea level.
How much of the Cook Inlet would be land if sea level dropped?
With the sea 10 m lower, about 2,599 km² (15.2%) of its water would be land. At 6,000 m lower, 100% would be. This is a simple bathtub model that lowers the sea evenly everywhere.
Data: depths from the GEBCO_2026 grid, statistics worked out inside the Natural Earth outline of the bay. See data sources and licences. The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea.